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Gate-tunable Hall sensors on large area CVD graphene protected by h-BN with 1D edge contacts

Bogdan Karpiak (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; André Dankert (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Saroj Prasad Dash (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
Journal of Applied Physics (0021-8979). Vol. 122 (2017), 5, p. Article no 054506 .
[Artikel, refereegranskad vetenskaplig]

Graphene is an excellent material for Hall sensors due to its atomically thin structure, high carrier mobility, and low carrier density. However, graphene devices need to be protected from the environment for reliable and durable performance in different environmental conditions. Here we present magnetic Hall sensors fabricated on large area commercially available chemical vapor deposited (CVD) graphene protected by exfoliated hexagonal boron nitride (h-BN). To connect the graphene active regions of Hall samples to the outputs, 1D edge contacts were utilized which show reliable and stable electrical properties. The operation of the Hall sensors shows the current-related sensitivity up to 345 V/(AT). By changing the carrier concentration and type in graphene by the application of gate voltage, we are able to tune the Hall sensitivity. Published by AIP Publishing.

Nyckelord: Magnetic-Field, Devices, Performance

Denna post skapades 2017-09-05. Senast ändrad 2017-10-03.
CPL Pubid: 251644


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik



Chalmers infrastruktur



Denna publikation är ett resultat av följande projekt:

Graphene-Based Revolutions in ICT And Beyond (GRAPHENE) (EC/FP7/604391)